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EP3265711B1 - Press sleeve, press fitting and use of the press fitting or the press sleeve - Google Patents

Press sleeve, press fitting and use of the press fitting or the press sleeve Download PDF

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Publication number
EP3265711B1
EP3265711B1 EP16704844.6A EP16704844A EP3265711B1 EP 3265711 B1 EP3265711 B1 EP 3265711B1 EP 16704844 A EP16704844 A EP 16704844A EP 3265711 B1 EP3265711 B1 EP 3265711B1
Authority
EP
European Patent Office
Prior art keywords
pressing sleeve
pressing
fitting body
compression sleeve
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16704844.6A
Other languages
German (de)
French (fr)
Other versions
EP3265711A1 (en
Inventor
Frank Hofmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viega Technology GmbH and Co KG
Original Assignee
Viega Technology GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Viega Technology GmbH and Co KG filed Critical Viega Technology GmbH and Co KG
Priority to PL16704844T priority Critical patent/PL3265711T3/en
Publication of EP3265711A1 publication Critical patent/EP3265711A1/en
Application granted granted Critical
Publication of EP3265711B1 publication Critical patent/EP3265711B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
    • F16L13/14—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
    • F16L13/14—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/146—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by an axially moveable sleeve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/046—Connecting tubes to tube-like fittings

Definitions

  • the invention relates to a compression sleeve for a press fitting for producing a sealing permanent pipe connection, having a receiving portion for receiving a Fittingground stressess and with a pressing portion, wherein the inner diameter of the receiving portion is adapted to the outer diameter of the Fittingground stressess and wherein the inner diameter of the pressing portion at least partially smaller than that Outer diameter of the fitting body is formed. Furthermore, the invention relates to a press fitting with a compression sleeve according to the invention and the use of a compression sleeve according to the invention or a press fitting according to the invention.
  • Press sleeves of the type mentioned are usually used in piping systems to connect pipes in cooperation with a fitting body metallic sealing and insoluble.
  • a generic compression sleeve is for example from the WO 2014/000897 A1 known.
  • a pipe end of the pipe to be connected is introduced into an opening of the fitting body, so that the fitting body surrounds the pipe end on the circumference.
  • the compression sleeve is pushed with the aid of a pressing tool on the fitting body in the axial direction, wherein the "axial direction" along the longitudinal axis of the pipe end and thus is oriented transversely to the pipe cross-section.
  • the diameter of the inner circumferential surface of the compression sleeve is designed to be tapered over the length measured in the axial direction of the compression sleeve, so that when the compression sleeve is pushed axially, the edge or the edge region of the fitting body is flanged and pressed into the pipe end to be connected. In other words, the edge or edge region of the Fitting ground stressess radially narrows in its diameter.
  • the compression sleeve preferably tapered lateral surface, therefore, an axial sliding of the compression sleeve is converted into a radial deformation of the fitting body.
  • the "radial direction” is oriented transversely to the longitudinal extension of the pipe end to be connected and thus transversely to the axial direction. In this way, the fitting body and the pipe end are plastically deformed by the axial sliding of the compression sleeve and pressed together.
  • the WO 93/09374 A1 describes a fitting with a two-part construction of a compression sleeve.
  • the compression sleeve comprises a press insert having a tapered inner surface and a substantially cylindrical pressure ring, in particular of a lightweight composite material.
  • the present invention is based on the technical problem of specifying a compression sleeve, a press fitting with such a compression sleeve and the use of such a compression sleeve or press fitting which does not or at least to a lesser extent have the aforementioned disadvantages, and in particular simpler and cost-effective way to enable the production of a robust sealing pipe connection.
  • the compression sleeve is characterized in that at least one resiliently elastically inwardly bracing retaining tab is provided in the receiving portion and that the retaining tab has a free end portion which projects in the relaxed state of the retaining tab in the radial direction at least partially into the inner region of the receiving portion.
  • the compression sleeve is secured in the assembled state against axial displacement.
  • the compression sleeve is clamped by the retaining tab in the radial direction with the fitting body, wherein the axial clamping of the compression sleeve counteracting friction between the compression sleeve and fitting body is reinforced by the radial clamping forces.
  • there is a form-locking connection counteracting the axial release between the compression sleeve and the fitting base body.
  • Such a positive connection can be formed in that the retaining tab penetrates in radially inwardly facing direction in the material of the fitting body or the fitting body elastically and / or plastically deformed.
  • such a positive connection can be formed in that the retaining tab in a circumferentially formed on the fitting body recess, such as a groove, a groove profile or the like, engages, in particular in the manner of a snap connection.
  • the positive connection between retaining tab and fitting body may be formed in the region of the free end portion of the retaining tab.
  • the axial securing of the compression sleeve on the fitting body by the at least one retaining tab can already act in a preassembled state of the compression sleeve, wherein the fitting body is received in the preassembled state in the receiving portion of the compression sleeve, while the edge or edge region of the fitting body in the preassembled state not flanged.
  • the receiving section may circumferentially receive the edge or edge region of the fitting base body to be pressed in the preassembled state, while the pressing section is arranged in the axial direction adjacent to the edge or edge region of the fitting base body.
  • the inner region of the receiving portion may be an opening, for example a substantially cylindrical one, which is adapted to the outer diameter of the fitting body.
  • Adjusted in this context means that between the receiving section and the fitting body a suitable pressing, transitional or clearance can be formed, which allows for the particular application reliable (pre) assembly of compression sleeve and fitting body.
  • the fitting body may be a substantially cylindrical sleeve.
  • the compression sleeve can be produced by forming, in particular deep drawing.
  • the compression sleeve can be made in one piece by deep drawing from a metal sheet.
  • the edge or edge region of the pressing section facing away from the receiving section can be recessed outwards.
  • the flanged edge or edge region of the pressing portion may, for example, describe a substantially annular, circular circumferential collar.
  • the retaining tab can be released by a provided between an inner and an outer circumferential surface of the compression sleeve radial opening.
  • the opening can be made for example by punching and / or machining. After releasing the retaining tab or making the opening, the retaining tab can be bent radially inwardly, so that the free end portion of the retaining tab engages at least partially in the Innnen Quarry of the receiving portion.
  • the material or wall thickness of the retaining tab preferably corresponds to the material or wall thickness of the compression sleeve, wherein compression sleeve and retaining tab are in particular formed in one piece.
  • the retaining tab can be made inexpensively from a metal sheet together with the compression sleeve or as an integral part of the compression sleeve.
  • the compression sleeve in the region of the receiving portion on an intended for insertion of the fitting body end face is inclined according to this embodiment in the direction away from the end face.
  • the retaining tab is inclined, in particular in the manner of a mounting bevel, against the end face intended for insertion of the fitting body.
  • the insertion of the fitting body is facilitated by the orientation of the retaining tab.
  • the retaining tab may be provided on the front side in the region of the receiving portion.
  • the front-side retaining tab can be made by punching and / or machining a sheet or sleeve with subsequent deep drawing and / or crimping the front edge portion of the receiving portion of the compression sleeve.
  • one of the end face facing guide surface of the retaining tab can be arranged inclined to an axis of the compression sleeve at an angle, wherein the angle is greater than 0 ° and smaller than 90 °.
  • the guide surface may be set at an acute angle relative to a central axis of the compression sleeve. The guide surface can serve during insertion of the fitting body to implement the axial relative movement between the compression sleeve and the fitting body in a bracing of the retaining tab against the fitting body.
  • the guide surface preferably slides along an end face of the fitting base body or along the edge of the fitting base body delimiting the outer lateral surface of the fitting body, is thereby displaced circumferentially outwards from the fitting body in the radial direction and thus resiliently clamped inwardly against the fitting body ,
  • This effect can be achieved both during pre-assembly of the compression sleeve on the fitting body and as an alternative or in addition during compression of compression sleeve, Fittingground stresses and a pipe to be connected.
  • a press edge provided for bearing against the fitting body may be formed, wherein the pressing edge is in particular sharp-edged.
  • the term "sharp-edged” is understood to mean a pressing edge which forms an angle of less than or equal to 90 °. The smaller the angle, the sharper the edging edge. With the help of the pressing edge, the clamping effect of the retaining tab acting against the axial displacement of the compression sleeve in the fully assembled state can be enhanced.
  • the pressing edge is preferably formed to penetrate circumferentially into the material of the fitting body. By the press edge, a positive locking of the retaining tab in the material of the fitting body can be achieved.
  • the equipped with the press edge free end portion of the retaining tab can counteract an axial displacement between the compression sleeve and fitting body in a pre-assembled and / or a fully assembled state of the compression sleeve form fit.
  • the pressed tab provided with a retaining tab can prevent axial slipping of the compression sleeve of the fitting body in the manner of a barb or a claw.
  • an axial sliding of the compression sleeve can be made possible on the fitting body in the assembly or pressing direction, while on the other hand a subsequent removal of the compression sleeve is blocked or blocked against the mounting direction by the retaining tab, so that the removal of the compression sleeve of the fitting body not possible nondestructive is.
  • the receiving section of the compression sleeve can have a substantially constant opening width along its length measured in the axial direction.
  • the receiving section can be used for pre-assembling and guiding the fitting body to be pressed with the compression sleeve and simplify the assembly or pressing process.
  • the inner contour of the receiving portion may alternatively be tapered in an axial longitudinal section at least partially conical and / or arcuate and / or designed to be tapered straight.
  • This inner contour can be interrupted at least in sections by the at least one retaining tab.
  • the at least one retaining tab may extend, in particular starting from the inner contour of the receiving portion, at least in sections in a direction radially inward.
  • the at least one retaining tab may in particular be designed such that the retaining tab defines in the relaxed state, at least in sections, the clear width of the receiving portion.
  • the at least one retaining tab can define an opening with an inner circumferential surface of the receiving section and / or one or more further retaining tabs whose diameter or inside width is smaller than the outer diameter of the fitting body.
  • the compression sleeve can be designed such that the free end portion of the retaining tab when pushing the compression sleeve on the fitting body displaced by the outer surface of the fitting body in the radial direction to the outside and is clamped in this way against the fitting body.
  • the bracing of the retaining tab can take place automatically during the axial pushing on of the compression sleeve on the fitting body, without an additional step would be required.
  • the compression sleeve with one of the WO 2014/000897 A1 be joined and clamped known pressing tool.
  • the pressing portion may be connected to the receiving portion extending in a direction away from the end face, wherein the inner diameter of the pressing portion is designed to be tapered in the direction away from the end face.
  • the receiving portion and the pressing portion in particular their inner contours, can in particular without jump, ie, for example tangent or curvature continuous, merge directly into each other.
  • the compression sleeve can be directly in the axial direction on the Fitting body are postponed. So can be done in a simple manner, in particular as smooth as possible pressing.
  • An end section extending in the direction away from the end face can be connected to the pressing section, with the pressing sleeve in particular having a substantially constant opening width in the region of the end section.
  • the contact or pressing surface formed between the compression sleeve and the fitting base body can be increased in order to further improve the axial fixation of the compression sleeve on the fitting base body.
  • the end section can be flanged outwards for reinforcing the press section and, for example, describe a collar that in particular runs substantially circular.
  • the receiving portion may merge the front side in a circular circumferential flange.
  • the compression sleeve can be designed in the region of this end face, for example in the manner of a funnel to facilitate the insertion of a Fittinggrund stressess.
  • the retaining tabs may be extending starting from the flange in at least partially radially inwardly facing direction.
  • At least two, in particular at least three retaining tabs may be provided. In this way, the axial security is further enhanced.
  • the retaining tabs can be arranged at regular angular intervals from each other. Thus, a tilting of the compression sleeve when pushed onto the fitting body can be prevented by a formed by the retaining tabs substantially symmetrical leadership.
  • the retaining tabs are designed as separate elements.
  • the retaining tabs can be made of a different material than the rest of the compression sleeve, in particular the pressing section.
  • the function of the retaining tabs can be further optimized, for example, a particularly elastic material can be used. If a press edge is provided on the retaining tabs, a particularly hard material can also be used.
  • the design of the retaining tabs as separate elements also simplifies the production of the compression sleeve, since the retaining tabs can also be produced separately and then inserted into the compression sleeve.
  • the retaining tabs can be provided in the form of a separate cutting ring for easy production of the compression sleeve. Such a cutting ring with retaining tabs can be positively inserted into a groove in the compression sleeve.
  • the invention further relates to a press fitting for a sealing, permanent pipe connection, with a fitting body for receiving at least one pipe to be connected and with a compression sleeve according to the invention.
  • the fitting body may be a substantially rotationally symmetrical, in particular cylindrical, component, such as e.g. a sleeve or a piece of pipe.
  • the at least one retaining tab in particular improves the axial retention of the compression sleeve on a substantially smooth, in particular groove and / or recess-free, outer lateral surface of the fitting body.
  • one or more recesses formed peripherally on the fitting body such as a groove, a groove profile or the like, can be provided, into which the retaining lug engages, in particular in the manner of a snap connection.
  • Press fitting and compression sleeve are provided for example for connecting pipes with a circular cross-section.
  • the compression sleeve and / or the Fittingground manipulate can be formed for example of a steel, especially stainless steel, or copper material, in particular brass, or aluminum material.
  • the material of the compression sleeve may have a higher hardness than the material of the fitting body. This can be a penetration of the free end portion of the retaining tab in the material of the Fitting basic body and thus the axial fixation of the compression sleeve on the fitting body are favored.
  • the invention also relates to the use of a compression sleeve or a press fitting according to any one of the preceding claims in a heating, air conditioning, sanitary or drinking water installation, or installation for the transport of technical or medical fluids.
  • a compression sleeve or a press fitting according to any one of the preceding claims in a heating, air conditioning, sanitary or drinking water installation, or installation for the transport of technical or medical fluids.
  • Fig. 1 shows a first compression sleeve 2 in a perspective view.
  • the press sleeve 2 for a press fitting for producing a sealing permanent pipe connection has a receiving portion 4 for receiving a radially to be compressed Fittingground stresses 6 (see Fig. 2 ).
  • the compression sleeve 2 has a press section 8 designed to radially narrow the fitting body 6, which is designed to be tapered along an axis A.
  • the inner diameter of the receiving portion 4 is adapted to the outer diameter of the Fittingground emotionss 6.
  • the inner diameter of the pressing portion 8 is at least partially smaller than the outer diameter of the fitting body 6.
  • the compression sleeve 2 has three in the radial direction resiliently elastically against the fitting body 6 bracing retaining tabs 10.
  • the retaining tabs 10 each have a free end portion 12. In the relaxed state ( Fig. 1 ) of the retaining tabs 10, the respective end section 12 projects at least partially into the inner region of the receiving section 4 in the radial direction R.
  • the compression sleeve 2 is made by deep drawing from a metal sheet.
  • the retaining tabs 10 are exposed by provided between an inner circumferential surface 14 and an outer circumferential surface 16 of the compression sleeve 2 radial openings 18.
  • the openings 18 are made by punching.
  • the retaining tabs 10 have been bent inwardly in the radial direction R after punching, so that the respective free end portion 12 of a retaining tab 10 in the relaxed state ( Fig. 1 ) projects at least partially into the inner region of the receiving portion 4.
  • the compression sleeve 2 has a front side 20 provided for insertion of the fitting body 6.
  • the retaining tabs 10 are inclined in the direction away from the end 20 direction.
  • One of the end face 20 facing guide surface 22 of the respective retaining tab 10 is inclined to the axis A at an acute angle ⁇ (see Fig. 2 ).
  • the retaining tab 10 has in the region of its free end portion 12 a rectangular, ie sharp-edged pressing edge 24 which is provided for engagement with the fitting base 6.
  • the receiving section 4 of the compression sleeve 2 is assigned to the end face 20 provided for insertion of the fitting base body 6.
  • the receiving section 4 has a substantially constant opening width along its length measured in the axial direction.
  • pressing section 8 is connected to the receiving portion 4 of extending in the direction away from the end face 20.
  • the pressing section 8 is tapered in the direction away from the end face 20.
  • To the pressing portion 8 a in the direction away from the end face 20 remote end portion 26 is connected, in which the compression sleeve 2 has a substantially constant opening width.
  • the retaining tabs 10 are provided in the receiving portion 4.
  • the retaining tabs 10 are arranged at regular angular intervals from one another.
  • Fig. 2 shows two press sleeves 2 according to Fig. 1 and the fitting body 6 to be pressed by the press sleeves 2 in a pre-assembled state.
  • the press sleeves 2 and the Fittingground stresses 6 form a press fitting 28 for connecting two pipe ends 30 (see Fig. 3 ).
  • the pipe ends 30 are each inserted into the fitting body 6. By crimping the edge 32 of the fitting body 6, the pipe ends 30 are pressed with the fitting body 6.
  • the compression sleeves 2, starting from the in Fig. 2 shown pre-assembly in the axial direction along the axis A pushed onto the fitting body 6.
  • Fig. 3 shows the press fitting 28 with the pipe ends 30 in the fully assembled, compressed state.
  • the pipe ends 30 are each inserted into the fitting base body 6 up to a stop 34 provided in the region of the inner circumferential surface of the fitting body 6. From the enlarged view can be seen how compression sleeve 2, Fittinggrund stresses 6 and pipe end 30 each cooperate.
  • the compression sleeve 2 When pressing the press fitting 28 with a respective pipe end 30, the compression sleeve 2 is pushed in the axial direction on the fitting base 6. This is not shown here, for example WO 2014/000897 A1 known pressing tool used.
  • the edge region or the edge 32 of the fitting body 4 slides during the axial displacement along the diameter narrowing pressing portion 8 of the compression sleeve 2 from.
  • the edge region or the edge 32 of the fitting body 6 is flanged in radially inwardly facing direction.
  • the compression sleeve 2 forms a die, wherein the edge region or the edge 32 of the Fittinggrund emotionss 6 during the pressing process to the tapered pressing section 8 of the compression sleeve 2 conforms, so that the edge region or the edge 32 of the Fittinggrund stressess 6 along the Slid inner contour of the pressing section 8 and thereby plastically deformed.
  • the shape of the compression sleeve 2 remains substantially unchanged.
  • the retaining tabs 10 engage with their press edges 24 in the material of the fitting body 6 and prevent axial slipping of the respective compression sleeve 2 of the Fittinggroundianu 6.
  • the material of the compression sleeve 2 is harder than the material of the Fittingground stressess 6.
  • the respective compression sleeve 2 is after axial sliding on the fitting body 6 no longer destructively removable from the fitting body 6, since the retaining tabs 10 with the free end portions 12 cling in the fitting body 6.
  • Fig. 4 shows a second embodiment of a compression sleeve 2 in a perspective view.
  • Fig. 3 illustrated compression sleeve 2 is different only by the in Fig. 1 described embodiment that has been dispensed with the end portion.
  • Fig. 5 shows two press sleeves 2 according to Fig. 4 and a fitting body 6 in a preassembled state.
  • the retaining tabs 10 secure the press sleeves 2 already in the preassembled state by an axial withdrawal or slipping of the press sleeves 2 of the fitting body 6 against the mounting or joining direction.
  • Fig. 6 shows two press sleeves 2 according to Fig. 4 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail in turn the interaction of compression sleeve 2, Fittinggrund stresses 6 and pipe end 30 can be seen.
  • Fig. 7 shows a third embodiment of a compression sleeve 2 in a perspective view, which is characterized by the in Fig. 1 described embodiment that has been dispensed with an end portion and that the receiving portion 4 merges the front side in a circular peripheral flange 36.
  • the retaining tabs 10 are arranged in the region of the flange 36.
  • the retaining tabs 10 are compared to the embodiments described above at a much steeper angle ⁇ against the axis A employed. In this way, a particularly narrow axial design of the compression sleeve is achieved.
  • Fig. 8 shows two press sleeves 2 according to Fig. 7 and a fitting body 6 in a preassembled state.
  • the retaining tabs 10 secure the press sleeves 2 already in the preassembled state by an axial withdrawal or slipping of the press sleeves 2 of the fitting body 6 against the mounting or joining direction.
  • Fig. 9 shows two press sleeves 2 according to Fig. 7 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail, the interaction of compression sleeve 2, Fittinggrund stresses 6 and pipe end 30 can be seen.
  • Fig. 10 shows a fourth embodiment of a compression sleeve 2 in a perspective view.
  • compression sleeve 2 is characterized in that the retaining tabs 10 are provided directly on the front side of the receiving portion 4. Both the edge of the receiving portion and the edge of the pressing portion are flanged circular or arcuate. In this way, the compression sleeve 2 is reinforced or stiffened against radial expansion during the pressing process.
  • Fig. 11 shows two press sleeves 2 according to Fig. 10 and a fitting body 6 in a preassembled state.
  • the retaining tabs 10 secure the press sleeves 2 already in the preassembled state by an axial withdrawal or slipping of the press sleeves 2 of the fitting body 6 against the mounting or joining direction.
  • Fig. 12 shows two press sleeves 2 according to Fig. 10 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail, the interaction of compression sleeve 2, Fittinggrund stresses 6 and pipe end 30 can be seen.
  • Fig. 13 shows a fifth embodiment of a compression sleeve 2 in a perspective view.
  • the retaining tab 10 is provided directly on the front side of the receiving portion 4, wherein the retaining tab 10 extends over the entire circumference of the compression sleeve 2.
  • the edge of the receiving portion 4 is curved in an arcuate shape by more than 90 ° inwardly.
  • the compression sleeve 2 is further opposite to in the 10 to 12 shown Embodiment designed from a component with different wall thicknesses, in particular to reinforce the pressing region 8.
  • Fig. 14 shows two press sleeves 2 according to Fig. 13 and a fitting body 6 in a preassembled state.
  • the retaining tab 10 secures the press sleeves 2 in the preassembled state by an axial withdrawal or slipping of the press sleeves 2 of the fitting body 6 against the mounting or joining direction.
  • Fig. 15 shows two press sleeves 2 according to Fig. 13 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail, the interaction of compression sleeve 2, Fittinggrund stresses 6 and pipe end 30 can be seen.
  • Fig. 16 shows a sixth embodiment of a compression sleeve 2 in a perspective view.
  • the retaining tabs 10 are in this case designed as elements of a separate from the main body of the compression sleeve 2 cutting ring 38.
  • a plurality of retaining tabs 10 are provided over the cutting ring 38 along the circumference of the compression sleeve.
  • the cutting ring 38 and the retaining tabs 10 may be made of a different material from the rest of the compression sleeve.
  • Fig. 17 shows two press sleeves 2 according to Fig. 16 and a fitting body 6 in a preassembled state.
  • the cutting ring 38 with the holding tabs arranged thereon is held in a groove 40 in the receiving portion 4.
  • the retaining tab 10 secures the press sleeves 2 in the preassembled state on the fitting body 6.
  • Fig. 18 shows two press sleeves 2 according to Fig. 16 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail, the interaction of compression sleeve 2, Fittinggrund stresses 6 and pipe end 30 can be seen.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Joints With Sleeves (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Description

Die Erfindung betrifft eine Presshülse für einen Pressfitting zum Herstellen einer dichtenden unlösbaren Rohrverbindung, mit einem Aufnahmeabschnitt zum Aufnehmen eines Fittinggrundkörpers und mit einem Pressabschnitt, wobei der Innendurchmesser des Aufnahmeabschnitts an den Außendurchmesser des Fittinggrundkörpers angepasst ist und wobei der Innendurchmesser des Pressabschnitts zumindest abschnittsweise kleiner als der Außendurchmesser des Fittinggrundkörpers ausgebildet ist. Weiter betrifft die Erfindung einen Pressfitting mit einer erfindungsgemäßen Presshülse und die Verwendung einer erfindungsgemäßen Presshülse oder eines erfindungsgemäßen Pressfittings.The invention relates to a compression sleeve for a press fitting for producing a sealing permanent pipe connection, having a receiving portion for receiving a Fittinggrundkörpers and with a pressing portion, wherein the inner diameter of the receiving portion is adapted to the outer diameter of the Fittinggrundkörpers and wherein the inner diameter of the pressing portion at least partially smaller than that Outer diameter of the fitting body is formed. Furthermore, the invention relates to a press fitting with a compression sleeve according to the invention and the use of a compression sleeve according to the invention or a press fitting according to the invention.

Presshülsen der eingangs genannten Art werden üblicherweise in Rohrleitungssystemen eingesetzt, um im Zusammenwirken mit einem Fittinggrundkörper Rohre metallisch dichtend und unlösbar miteinander zu verbinden. Eine gattungsgemäße Presshülse ist beispielsweise aus der WO 2014/000897 A1 bekannt.Press sleeves of the type mentioned are usually used in piping systems to connect pipes in cooperation with a fitting body metallic sealing and insoluble. A generic compression sleeve is for example from the WO 2014/000897 A1 known.

Gemäß der WO 2014/000897 A1 wird zum Herstellen einer metallisch dichtenden unlösbaren Rohrverbindung zunächst ein Rohrende des zu verbindenden Rohrs in eine Öffnung des Fittinggrundkörpers eingeführt, so dass der Fittinggrundkörper das Rohrende umfangsseitig umschließt. Die Presshülse wird mit Hilfe eines Presswerkzeugs auf den Fittinggrundkörper in axialer Richtung aufgeschoben, wobei die "axiale Richtung" entlang der Längsachse des Rohrendes und damit quer zum Rohrquerschnitt orientiert ist. Der Durchmesser der inneren Mantelfläche der Presshülse ist über der in axialer Richtung gemessenen Länge der Presshülse verjüngt ausgeführt, so dass beim axialen Aufschieben der Presshülse der Rand bzw. der Randbereich des Fittinggrundkörpers umgebördelt und in das zu verbindende Rohrende eingedrückt wird. Mit anderen Worten wird der Rand bzw. Randbereich des Fittinggrundkörpers in seinem Durchmesser radial verengt. Durch die an der Presshülse vorgesehene, vorzugsweise konisch zulaufende Mantelfläche wird daher ein axiales Aufschieben der Presshülse in eine radiale Verformung des Fittinggrundkörpers umgesetzt. Die "radiale Richtung" ist dabei quer zur Längserstreckung des anzubindenden Rohrendes und damit quer zu axialen Richtung orientiert. Auf diese Weise werden der Fittinggrundkörper und das Rohrende durch das axiale Aufschieben der Presshülse plastisch verformt und miteinander verpresst.According to the WO 2014/000897 A1 For producing a metal-sealing permanent pipe connection, first a pipe end of the pipe to be connected is introduced into an opening of the fitting body, so that the fitting body surrounds the pipe end on the circumference. The compression sleeve is pushed with the aid of a pressing tool on the fitting body in the axial direction, wherein the "axial direction" along the longitudinal axis of the pipe end and thus is oriented transversely to the pipe cross-section. The diameter of the inner circumferential surface of the compression sleeve is designed to be tapered over the length measured in the axial direction of the compression sleeve, so that when the compression sleeve is pushed axially, the edge or the edge region of the fitting body is flanged and pressed into the pipe end to be connected. In other words, the edge or edge region of the Fittinggrundkörpers radially narrows in its diameter. By provided on the compression sleeve, preferably tapered lateral surface, therefore, an axial sliding of the compression sleeve is converted into a radial deformation of the fitting body. The "radial direction" is oriented transversely to the longitudinal extension of the pipe end to be connected and thus transversely to the axial direction. In this way, the fitting body and the pipe end are plastically deformed by the axial sliding of the compression sleeve and pressed together.

Bei den aus der WO 2014/000897 A1 bekannten Fittings kann es vereinzelt dazu kommen, dass die vormontierte Presshülse vor dem Verpressen wieder von dem Fittinggrundkörper rutscht. Des Weiteren können sich unter Umständen an der verpressten Verbindung Undichtigkeiten bei Biege- oder Zugbelastungen ergeben.In the from the WO 2014/000897 A1 known fittings may occasionally happen that the pre-assembled compression sleeve slips back from the fitting body before pressing. Furthermore, under certain circumstances, the compressed connection may result in leaks in the case of bending or tensile loads.

Die WO 93/09374 A1 beschreibt ein Fitting mit einem zweiteiligen Aufbau einer Presshülse. Die Presshülse umfasst einen Presseinsatz mit einer verjüngenden Innenfläche und einen im Wesentlichen zylindrischen Pressring insbesondere aus einem leichtgewichtigen Verbundmaterial.The WO 93/09374 A1 describes a fitting with a two-part construction of a compression sleeve. The compression sleeve comprises a press insert having a tapered inner surface and a substantially cylindrical pressure ring, in particular of a lightweight composite material.

Der vorliegenden Erfindung liegt vor diesem Hintergrund das technische Problem zugrunde, eine Presshülse, einen Pressfitting mit einer solchen Presshülse und die Verwendung einer solchen Presshülse oder eines solchen Pressfittings anzugeben, welche die zuvor genannten Nachteile nicht oder zumindest in geringerem Maße aufweisen, und insbesondere in einfacher und kostengünstiger Weise die Herstellung einer robusten dichtenden Rohrverbindung ermöglichen.Against this background, the present invention is based on the technical problem of specifying a compression sleeve, a press fitting with such a compression sleeve and the use of such a compression sleeve or press fitting which does not or at least to a lesser extent have the aforementioned disadvantages, and in particular simpler and cost-effective way to enable the production of a robust sealing pipe connection.

Das technische Problem wird durch eine Presshülse nach Anspruch 1, einen Pressfitting mit einer solchen Presshülse nach Anspruch 13 und die Verwendung der Presshülse oder des Pressfittings nach Anspruch 14 gelöst.The technical problem is solved by a compression sleeve according to claim 1, a press fitting with such a compression sleeve according to claim 13 and the use of the compression sleeve or the press fitting according to claim 14.

Die Presshülse zeichnet sich dadurch aus, dass im Aufnahmeabschnitt mindestens eine in radialer Richtung federnd elastisch nach innen verspannbare Haltelasche vorgesehen ist und dass die Haltelasche einen freien Endabschnitt aufweist, der im entspannten Zustand der Haltelasche in radialer Richtung mindestens teilweise in den Innenbereich des Aufnahmeabschnitts hineinragt.The compression sleeve is characterized in that at least one resiliently elastically inwardly bracing retaining tab is provided in the receiving portion and that the retaining tab has a free end portion which projects in the relaxed state of the retaining tab in the radial direction at least partially into the inner region of the receiving portion.

Mit Hilfe der Haltelasche wird die Presshülse im fertig montierten Zustand entgegen einem axialen Verschieben gesichert. Dabei wird die Presshülse durch die Haltelasche in radialer Richtung mit dem Fittinggrundkörper verklemmt, wobei durch die radialen Klemmkräfte die einem axialen Lösen der Presshülse entgegenwirkende Reibung zwischen Presshülse und Fittinggrundkörper verstärkt wird. Ergänzend oder alternativ besteht im fertig montierten Zustand eine dem axialen Lösen entgegenwirkende formschlüssige Verbindung zwischen der Presshülse und dem Fittinggrundkörper. Eine solche formschlüssige Verbindung kann dadurch gebildet sein, dass die Haltelasche in radial nach innen gewandter Richtung in das Material des Fittinggrundkörpers eindringt bzw. den Fittinggrundkörper elastisch und/oder plastisch verformt. Alternativ oder ergänzend kann eine solche formschlüssige Verbindung dadurch gebildet sein, dass die Haltelasche in eine umfangsseitig an dem Fittinggrundkörper gebildete Vertiefung, wie einer Nut, ein Rillenprofil oder dergleichen, einrastet, insbesondere nach Art einer Schnappverbindung. Die formschlüssige Verbindung zwischen Haltelasche und Fittinggrundkörper kann im Bereich des freien Endabschnitts der Haltelasche gebildet sein.With the help of the retaining tab, the compression sleeve is secured in the assembled state against axial displacement. In this case, the compression sleeve is clamped by the retaining tab in the radial direction with the fitting body, wherein the axial clamping of the compression sleeve counteracting friction between the compression sleeve and fitting body is reinforced by the radial clamping forces. Additionally or alternatively, in the fully assembled state, there is a form-locking connection counteracting the axial release between the compression sleeve and the fitting base body. Such a positive connection can be formed in that the retaining tab penetrates in radially inwardly facing direction in the material of the fitting body or the fitting body elastically and / or plastically deformed. Alternatively or additionally, such a positive connection can be formed in that the retaining tab in a circumferentially formed on the fitting body recess, such as a groove, a groove profile or the like, engages, in particular in the manner of a snap connection. The positive connection between retaining tab and fitting body may be formed in the region of the free end portion of the retaining tab.

Die axiale Sicherung der Presshülse auf dem Fittinggrundkörper durch die mindestens eine Haltelasche kann bereits in einem vormontierten Zustand der Presshülse wirken, wobei der Fittinggrundkörper in dem vormontierten Zustand im Aufnahmeabschnitt der Presshülse aufgenommen ist, während der Rand bzw. Randbereich des Fittinggrundkörpers in dem vormontierten Zustand noch nicht umgebördelt ist. Mit anderen Worten kann der Aufnahmeabschnitt den zu verpressenden Rand bzw. Randbereich des Fittinggrundkörpers im vormontierten Zustand umfangsseitig aufnehmen, während der Pressabschnitt in axialer Richtung benachbart zu dem Rand bzw. Randbereich des Fittinggrundkörpers angeordnet ist.The axial securing of the compression sleeve on the fitting body by the at least one retaining tab can already act in a preassembled state of the compression sleeve, wherein the fitting body is received in the preassembled state in the receiving portion of the compression sleeve, while the edge or edge region of the fitting body in the preassembled state not flanged. In other words, the receiving section may circumferentially receive the edge or edge region of the fitting base body to be pressed in the preassembled state, while the pressing section is arranged in the axial direction adjacent to the edge or edge region of the fitting base body.

Der Innenbereich des Aufnahmeabschnitts kann eine, beispielsweise im Wesentlichen zylindrische, Öffnung sein, die an den Außendurchmesser des Fittinggrundkörpers angepasst ist. "Angepasst" bedeutet in diesem Zusammenhang, dass zwischen dem Aufnahmeanschnitt und dem Fittinggrundkörper eine geeignete Press-, Übergangs- oder Spielpassung gebildet sein kann, die eine für den jeweiligen Anwendungsfall zuverlässige (Vor-)Montage von Presshülse und Fittinggrundkörper ermöglicht. Der Fittinggrundkörper kann eine im Wesentlichen zylinderförmige Hülse sein.The inner region of the receiving portion may be an opening, for example a substantially cylindrical one, which is adapted to the outer diameter of the fitting body. "Adjusted" in this context means that between the receiving section and the fitting body a suitable pressing, transitional or clearance can be formed, which allows for the particular application reliable (pre) assembly of compression sleeve and fitting body. The fitting body may be a substantially cylindrical sleeve.

In bevorzugter Weise kann die Presshülse durch Umformen, insbesondere Tiefziehen, hergestellt sein. Somit kann zur Herstellung der Presshülse auf das kostengünstige und materialsparende Umformen, insbesondere Blechumformen, zurückgegriffen werden, da die Haltelasche der eingangs beschriebenen Neigung durch Umformen hergestellter Presshülsen entgegenwirkt, nach dem Fügen von dem Fittinggrundkörper abzurutschen. Die Presshülse kann dabei einstückig durch Tiefziehen aus einem Blech hergestellt sein.In a preferred manner, the compression sleeve can be produced by forming, in particular deep drawing. Thus, for the production of the compression sleeve on the cost-effective and material-saving forming, in particular sheet metal forming, are used, since the retaining tab counteracts the inclination described above produced by forming compression sleeves to slip after joining of the fitting body. The compression sleeve can be made in one piece by deep drawing from a metal sheet.

Zur Verstärkung bzw. Aussteifung des Pressabschnitts kann der dem Aufnahmeabschnitt abgewandte Rand bzw. Randbereich des Pressabschnitts nach außen umgebörderlt sein. Der umgebördelte Rand bzw. Randbereich des Pressabschnitts kann beispielsweise einen im Wesentlichen ringförmigen, kreisrund umlaufenden Kragen beschreiben.For reinforcing or stiffening of the pressing section, the edge or edge region of the pressing section facing away from the receiving section can be recessed outwards. The flanged edge or edge region of the pressing portion may, for example, describe a substantially annular, circular circumferential collar.

Die Haltelasche kann durch eine zwischen einer inneren und einer äußeren Mantelfläche der Presshülse vorgesehene radiale Öffnung freigestellt sein. Die Öffnung kann beispielsweise durch Stanzen und/oder spanende Bearbeitung hergestellt sein. Nach dem Freistellen der Haltelasche bzw. dem Herstellen der Öffnung kann die Haltelasche radial nach innen gebogen werden, so dass der freie Endabschnitt der Haltelasche mindestens teilweise in den Innnenbereich des Aufnahmeabschnitts eingreift. Die Material- bzw. Wandstärke der Haltelasche entspricht bevorzugt der Material- oder Wandstärke der Presshülse, wobei Presshülse und Haltelasche insbesondere einstückig gebildet sind. Die Haltelasche kann zusammen mit der Presshülse bzw. als integraler Bestandteil der Presshülse kostengünstig aus einem Blech gefertigt sein.The retaining tab can be released by a provided between an inner and an outer circumferential surface of the compression sleeve radial opening. The opening can be made for example by punching and / or machining. After releasing the retaining tab or making the opening, the retaining tab can be bent radially inwardly, so that the free end portion of the retaining tab engages at least partially in the Innnenbereich of the receiving portion. The material or wall thickness of the retaining tab preferably corresponds to the material or wall thickness of the compression sleeve, wherein compression sleeve and retaining tab are in particular formed in one piece. The retaining tab can be made inexpensively from a metal sheet together with the compression sleeve or as an integral part of the compression sleeve.

Nach einer Ausgestaltung weist die Presshülse im Bereich des Aufnahmeabschnitts eine zum Einführen des Fittinggrundkörpers vorgesehene Stirnseite auf. Die Haltelasche ist gemäß dieser Ausgestaltung in von der Stirnseite abgewandter Richtung geneigt. Mit anderen Worten ist die Haltelasche insbesondere nach Art einer Montagefase entgegen der zum Einführen des Fittinggrundkörpers vorgesehenen Stirnseite geneigt. Das Einführen des Fittinggrundkörpers wird durch die Orientierung der Haltelasche erleichtert. Insbesondere kann die Haltelasche stirnseitig im Bereich des Aufnahmeabschnitts vorgesehen sein. Die stirnseitige Haltelasche kann durch Ausstanzen und/oder spanende Bearbeitung eines Blechs oder einer Hülse mit daran anschließendem Tiefziehen und/oder Umbördeln des stirnseitigen Randbereichs des Aufnahmeabschnitts der Presshülse hergestellt sein.According to one embodiment, the compression sleeve in the region of the receiving portion on an intended for insertion of the fitting body end face. The retaining tab is inclined according to this embodiment in the direction away from the end face. In other words, the retaining tab is inclined, in particular in the manner of a mounting bevel, against the end face intended for insertion of the fitting body. The insertion of the fitting body is facilitated by the orientation of the retaining tab. In particular, the retaining tab may be provided on the front side in the region of the receiving portion. The front-side retaining tab can be made by punching and / or machining a sheet or sleeve with subsequent deep drawing and / or crimping the front edge portion of the receiving portion of the compression sleeve.

Insbesondere kann eine der Stirnseite zugewandte Führungsfläche der Haltelasche zu einer zentralen Achse der Presshülse unter einem Winkel geneigt angeordnet sein, wobei der Winkel größer als 0° und kleiner als 90° ist. Mit anderen Worten kann die Führungsfläche relativ zu einer zentralen Achse der Presshülse unter einem spitzen Winkel angestellt sein. Die Führungsfläche kann beim Einführen des Fittinggrundkörpers dazu dienen, die axiale Relativbewegung zwischen Presshülse und Fittinggrundkörper in ein Verspannen der Haltelasche gegen den Fittinggrundkörper umzusetzen. Dabei gleitet die Führungsfläche bevorzugt entlang einer Stirnseite des Fittinggrundkörpers bzw. entlang dem die äußere Mantelfläche des Fittinggrundkörpers stirnseitig begrenzenden Rand des Fittinggrundkörpers ab, wird dadurch von dem Fittinggrundkörper umfangsseitig in radialer Richtung nach außen verdrängt und auf diese Weise federnd elastisch nach innen gegen den Fittinggrundkörper verspannt. Dieser Effekt kann sowohl beim Vormontieren der Presshülse auf dem Fittinggrundkörper sowie alternativ oder ergänzend beim Verpressen von Presshülse, Fittinggrundkörper und einem zu verbindenden Rohr erzielt werden.In particular, one of the end face facing guide surface of the retaining tab can be arranged inclined to an axis of the compression sleeve at an angle, wherein the angle is greater than 0 ° and smaller than 90 °. In other words, the guide surface may be set at an acute angle relative to a central axis of the compression sleeve. The guide surface can serve during insertion of the fitting body to implement the axial relative movement between the compression sleeve and the fitting body in a bracing of the retaining tab against the fitting body. In this case, the guide surface preferably slides along an end face of the fitting base body or along the edge of the fitting base body delimiting the outer lateral surface of the fitting body, is thereby displaced circumferentially outwards from the fitting body in the radial direction and thus resiliently clamped inwardly against the fitting body , This effect can be achieved both during pre-assembly of the compression sleeve on the fitting body and as an alternative or in addition during compression of compression sleeve, Fittinggrundkörper and a pipe to be connected.

Im Bereich des freien Endabschnitts der mindestens einen Haltelasche kann eine zur Anlage an dem Fittinggrundkörper vorgesehene Presskante ausgebildet sein, wobei die Presskante insbesondere scharfkantig ist. Unter dem Begriff "scharfkantig" wird vorliegen eine Presskante verstanden, die einen Winkel von kleiner oder gleich 90° bildet. Je geringer der Winkel ist, desto scharfkantiger ist die Presskante. Mit Hilfe der Presskante kann der entgegen einem axialen Verschieben der Presshülse im fertig montierten Zustand wirkende Klemmeffekt der Haltelasche verstärkt werden. Die Presskante ist bevorzugt dazu gebildet, in das Material des Fittinggrundkörpers umfangsseitig einzudringen. Durch die Presskante kann ein formschlüssiges Verkrallen der Haltelasche in dem Material des Fittinggrundkörpers erreicht werden. Der mit der Presskante ausgestattete freie Endabschnitt der Haltelasche kann einem axialen Verschieben zwischen Presshülse und Fittinggrundkörper in einem vormontierten und/oder einem fertig montierten Zustand der Presshülse formschlüssig entgegenwirken.In the region of the free end portion of the at least one retaining tab, a press edge provided for bearing against the fitting body may be formed, wherein the pressing edge is in particular sharp-edged. The term "sharp-edged" is understood to mean a pressing edge which forms an angle of less than or equal to 90 °. The smaller the angle, the sharper the edging edge. With the help of the pressing edge, the clamping effect of the retaining tab acting against the axial displacement of the compression sleeve in the fully assembled state can be enhanced. The pressing edge is preferably formed to penetrate circumferentially into the material of the fitting body. By the press edge, a positive locking of the retaining tab in the material of the fitting body can be achieved. The equipped with the press edge free end portion of the retaining tab can counteract an axial displacement between the compression sleeve and fitting body in a pre-assembled and / or a fully assembled state of the compression sleeve form fit.

Insbesondere für den Fall, dass die Haltelasche in von der zum Einführen der Presshülse vorgesehenen Stirnseite der Presshülse abgewandter Richtung erstreckt ist, kann die mit einer Presskante versehene Haltelasche ein axiales Abrutschen der Presshülse von dem Fittinggrundkörper nach Art eines Widerhakens oder einer Kralle verhindern. Einerseits kann ein axiales Aufschieben der Presshülse auf den Fittinggrundkörper in Montage- bzw. Pressrichtung ermöglicht sein, während andererseits ein anschließendes Abziehen der Presshülse entgegen der Montagerichtung durch die Haltelasche gesperrt bzw. blockiert wird, so dass das Abziehen der Presshülse von dem Fittinggrundkörper nicht zerstörungsfrei möglich ist.In particular, in the event that the retaining tab is extended in the direction away from the end of the compression sleeve end of the compression sleeve, the pressed tab provided with a retaining tab can prevent axial slipping of the compression sleeve of the fitting body in the manner of a barb or a claw. On the one hand, an axial sliding of the compression sleeve can be made possible on the fitting body in the assembly or pressing direction, while on the other hand a subsequent removal of the compression sleeve is blocked or blocked against the mounting direction by the retaining tab, so that the removal of the compression sleeve of the fitting body not possible nondestructive is.

Der Aufnahmeabschnitt der Presshülse kann entlang seiner in axialer Richtung gemessenen Länge eine im Wesentlichen konstante Öffnungsweite aufweisen. Eine "im Wesentlichen konstante Öffnungsweite" bedeutet hier, dass die Öffnungsweite des Aufnahmeabschnitts im Bereich einer oder mehrerer radial nach innen erstreckter Haltelaschen zumindest abschnittsweise lokal verengt ist. Der Aufnahmeabschnitt kann zum Vormontieren und Führen des mit der Presshülse zu verpressenden Fittinggrundkörpers dienen und den Montage- bzw. Pressvorgang vereinfachen.The receiving section of the compression sleeve can have a substantially constant opening width along its length measured in the axial direction. A "substantially constant opening width" here means that the opening width of the receiving portion is at least partially locally narrowed in the region of one or more retaining tabs extended radially inward. The receiving section can be used for pre-assembling and guiding the fitting body to be pressed with the compression sleeve and simplify the assembly or pressing process.

Die Innenkontur des Aufnahmeabschnitts kann alternativ dazu auch in einem axialen Längsschnitt zumindest abschnittsweise konisch und/oder bogenförmig verjüngt und/oder geradlinig verjüngt gestaltet sein. Diese Innenkontur kann dabei durch die mindestens eine Haltelasche zumindest abschnittsweise unterbrochen sein. Die mindestens eine Haltelasche kann sich insbesondere ausgehend von der Innenkontur des Aufnahmeabschnitts zumindest abschnittsweise in radial nach innen gewandter Richtung erstrecken.The inner contour of the receiving portion may alternatively be tapered in an axial longitudinal section at least partially conical and / or arcuate and / or designed to be tapered straight. This inner contour can be interrupted at least in sections by the at least one retaining tab. The at least one retaining tab may extend, in particular starting from the inner contour of the receiving portion, at least in sections in a direction radially inward.

Die mindestens eine Haltelasche kann insbesondere derart gestaltet sein, dass die Haltelasche im entspannten Zustand zumindest abschnittweise die lichte Weite des Aufnahmeabschnitts definiert. Die mindestens eine Haltelasche kann mit einer inneren Mantelfläche des Aufnahmeabschnitts und/oder einer oder mehreren weiteren Haltelaschen eine Öffnung begrenzen, deren Durchmesser bzw. lichte Weite geringer ist, als der Außendurchmesser des Fittinggrundkörpers. Die Presshülse kann derart gestaltet sein, dass der freie Endabschnitt der Haltelasche beim Aufschieben der Presshülse auf den Fittinggrundkörper durch die äußere Mantelfläche des Fittinggrundkörpers in radialer Richtung nach außen verdrängt und auf diese Weise gegen den Fittinggrundkörper verspannt wird. Das Verspannen der Haltelasche kann selbststätig während des axialen Aufschiebens der Presshülse auf den Fittinggrundkörper erfolgen, ohne dass ein zusätzlicher Arbeitsschritt erforderlich wäre. So kann die Presshülse beispielsweise mit einem aus der WO 2014/000897 A1 bekannten Presswerkzeug gefügt und verspannt werden.The at least one retaining tab may in particular be designed such that the retaining tab defines in the relaxed state, at least in sections, the clear width of the receiving portion. The at least one retaining tab can define an opening with an inner circumferential surface of the receiving section and / or one or more further retaining tabs whose diameter or inside width is smaller than the outer diameter of the fitting body. The compression sleeve can be designed such that the free end portion of the retaining tab when pushing the compression sleeve on the fitting body displaced by the outer surface of the fitting body in the radial direction to the outside and is clamped in this way against the fitting body. The bracing of the retaining tab can take place automatically during the axial pushing on of the compression sleeve on the fitting body, without an additional step would be required. For example, the compression sleeve with one of the WO 2014/000897 A1 be joined and clamped known pressing tool.

Der Pressabschnitt kann in von der Stirnseite abgewandter Richtung erstreckt an den Aufnahmeabschnitt angeschlossen sein, wobei der Innendurchmesser des Pressabschnitts in von der Stirnseite abgewandter Richtung verjüngt ausgeführt ist. Der Aufnahmeabschnitt und der Pressabschnitt, insbesondere deren Innenkonturen, können dabei insbesondere sprungfrei, d.h. z.B. tangenten- oder krümmungsstetig, unmittelbar ineinander übergehen. Nach dem Vormontieren eines Fittinggrundkörpers kann die Presshülse unmittelbar in axialer Richtung auf den Fittinggrundkörper aufgeschoben werden. So kann auf einfache Weise ein insbesondere möglichst ruckfreies Verpressen erfolgen.The pressing portion may be connected to the receiving portion extending in a direction away from the end face, wherein the inner diameter of the pressing portion is designed to be tapered in the direction away from the end face. The receiving portion and the pressing portion, in particular their inner contours, can in particular without jump, ie, for example tangent or curvature continuous, merge directly into each other. After preassembly of a Fittinggrundkörpers the compression sleeve can be directly in the axial direction on the Fitting body are postponed. So can be done in a simple manner, in particular as smooth as possible pressing.

An den Pressabschnitt kann ein in von der Stirnseite abgewandter Richtung erstreckter Endabschnitt angeschlossen sein, wobei die Presshülse im Bereich des Endabschnitts insbesondere eine im Wesentlichen konstante Öffnungsweite hat. Mit Hilfe des Endbereichs kann die zwischen Presshülse und Fittinggrundkörper gebildete Anlage- bzw. Pressfläche vergrößert werden um die axiale Fixierung der Presshülse auf dem Fittinggrundkörper weiter zu verbessern. In alternativen Ausgestaltungen kann der Endabschnitt zur Verstärkung des Pressabschnitts nach außen umgebördelt sein und beispielsweise einen insbesondere im Wesentlichen kreisrund umlaufenden Kragen beschreiben.An end section extending in the direction away from the end face can be connected to the pressing section, with the pressing sleeve in particular having a substantially constant opening width in the region of the end section. With the help of the end region, the contact or pressing surface formed between the compression sleeve and the fitting base body can be increased in order to further improve the axial fixation of the compression sleeve on the fitting base body. In alternative embodiments, the end section can be flanged outwards for reinforcing the press section and, for example, describe a collar that in particular runs substantially circular.

Der Aufnahmeabschnitt kann stirnseitig in einen kreisrund umlaufenden Flansch übergehen. So kann die Presshülse im Bereich dieser Stirnseite beispielsweise nach Art eines Trichters gestaltet sein, um das Einführen eines Fittinggrundkörpers zu erleichtern. Die Haltelaschen können ausgehend von dem Flansch in zumindest abschnittsweise radial nach innen gewandter Richtung erstreckt sein.The receiving portion may merge the front side in a circular circumferential flange. Thus, the compression sleeve can be designed in the region of this end face, for example in the manner of a funnel to facilitate the insertion of a Fittinggrundkörpers. The retaining tabs may be extending starting from the flange in at least partially radially inwardly facing direction.

Nach einer Ausgestaltung der Presshülse können mindestens zwei, insbesondere mindestens drei Haltelaschen vorgesehen sein. Auf diese Weise wird die axiale Sicherung weiter verstärkt.According to one embodiment of the compression sleeve at least two, in particular at least three retaining tabs may be provided. In this way, the axial security is further enhanced.

Die Haltelaschen können in regelmäßigen Winkelabständen zueinander angeordnet sein. Damit kann ein Verkanten der Presshülse beim Aufschieben auf den Fittinggrundkörper durch eine durch die Haltelaschen gebildete im Wesentlichen symmetrische Führung verhindert werden.The retaining tabs can be arranged at regular angular intervals from each other. Thus, a tilting of the compression sleeve when pushed onto the fitting body can be prevented by a formed by the retaining tabs substantially symmetrical leadership.

Insbesondere sind die Haltelaschen als separate Elemente ausgestaltet. Dadurch können die Haltelaschen aus einem anderen Material gefertigt sein als die restliche Presshülse, insbesondere der Pressabschnitt. Durch eine geeignete Materialwahl kann die Funktion der Haltelaschen weiter optimiert werden, beispielsweise kann ein besonders elastisches Material verwendet werden. Ist eine Presskante an den Haltelaschen vorgesehen, kann auch ein besonders hartes Material verwendet werden. Die Ausgestaltung der Haltelaschen als separate Elemente vereinfacht auch die Herstellung der Presshülse, da die Haltelaschen auch separat produziert und anschließend in die Presshülse eingesetzt werden können. Insbesondere können für eine einfache Herstellung der Presshülse die Haltelaschen in Form eines separaten Schneidrings bereitgestellt werden. Ein solcher Schneidring mit Haltelaschen kann formschlüssig in eine Nut in der Presshülse eingesetzt werden.In particular, the retaining tabs are designed as separate elements. As a result, the retaining tabs can be made of a different material than the rest of the compression sleeve, in particular the pressing section. By a suitable choice of material can the function of the retaining tabs can be further optimized, for example, a particularly elastic material can be used. If a press edge is provided on the retaining tabs, a particularly hard material can also be used. The design of the retaining tabs as separate elements also simplifies the production of the compression sleeve, since the retaining tabs can also be produced separately and then inserted into the compression sleeve. In particular, the retaining tabs can be provided in the form of a separate cutting ring for easy production of the compression sleeve. Such a cutting ring with retaining tabs can be positively inserted into a groove in the compression sleeve.

Die Erfindung betrifft weiter einen Pressfitting für eine dichtende, unlösbare Rohrverbindung, mit einem Fittinggrundkörper zur Aufnahme wenigstens eines zu verbindenden Rohrs und mit einer erfindungsgemäßen Presshülse. Der Fittinggrundkörper kann ein im Wesentlichen rotationssymmetrisches, insbesondere zylindrisches, Bauteil sein, wie z.B. eine Hülse oder ein Rohrstück. Die mindestens eine Haltelasche verbessert insbesondere den axialen Halt der Presshülse auf einer im Wesentlichen glatten, insbesondere nut- und/oder ausnehmungsfreien, äußeren Mantelfläche des Fittinggrundkörpers. Alternativ oder ergänzend können eine oder mehr umfangsseitig an dem Fittinggrundkörper gebildete Vertiefungen, wie eine Nut, ein Rillenprofil oder dergleichen, vorgesehen sein, in die die Haltelasche einrastet, insbesondere nach Art einer Schnappverbindung.The invention further relates to a press fitting for a sealing, permanent pipe connection, with a fitting body for receiving at least one pipe to be connected and with a compression sleeve according to the invention. The fitting body may be a substantially rotationally symmetrical, in particular cylindrical, component, such as e.g. a sleeve or a piece of pipe. The at least one retaining tab in particular improves the axial retention of the compression sleeve on a substantially smooth, in particular groove and / or recess-free, outer lateral surface of the fitting body. Alternatively or additionally, one or more recesses formed peripherally on the fitting body, such as a groove, a groove profile or the like, can be provided, into which the retaining lug engages, in particular in the manner of a snap connection.

Pressfitting und Presshülse sind beispielsweise zum Verbinden von Rohren mit kreisrundem Querschnitt vorgesehen.Press fitting and compression sleeve are provided for example for connecting pipes with a circular cross-section.

Die Presshülse und/oder der Fittinggrundkörper können beispielsweise aus einem Stahl-, insbesondere Edelstahl-, oder Kupferwerkstoff, insbesondere Messing, oder Aluminiumwerkstoff gebildet sein. Bevorzugt kann der Werkstoff der Presshülse eine höhere Härte haben, als der Werkstoff des Fittinggrundkörpers. Damit kann ein Eindringen des freien Endabschnitts der Haltelasche in das Material des Fittinggrundkörpers und damit die axiale Fixierung der Presshülse auf dem Fittinggrundkörper begünstigt werden.The compression sleeve and / or the Fittinggrundkörper can be formed for example of a steel, especially stainless steel, or copper material, in particular brass, or aluminum material. Preferably, the material of the compression sleeve may have a higher hardness than the material of the fitting body. This can be a penetration of the free end portion of the retaining tab in the material of the Fitting basic body and thus the axial fixation of the compression sleeve on the fitting body are favored.

Die Erfindung betrifft zudem die Verwendung einer Presshülse oder eines Pressfittings gemäß einem der voranstehenden Ansprüche in einer Heizungs-, Klima-, Sanitär oder Trinkwasserinstallation, oder einer Installation zum Transport technischer oder medizinischer Fluide. So kann beispielsweise durch die Verwendung der Presshülse oder des Pressfittings in einfacher und zuverlässiger Weise eine metallisch dichtende Verbindung zwischen zwei Rohrenden in den voranstehend genannten Anwendungsbereichen hergestellt werden.The invention also relates to the use of a compression sleeve or a press fitting according to any one of the preceding claims in a heating, air conditioning, sanitary or drinking water installation, or installation for the transport of technical or medical fluids. Thus, for example, by the use of the compression sleeve or the press fitting in a simple and reliable manner, a metal-sealing connection between two pipe ends in the above-mentioned application areas can be produced.

Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen näher erläutert. In der Zeichnung zeigen:

  • Fig. 1 eine erste Presshülse in einer perspektivischen Ansicht,
  • Fig. 2 zwei Presshülsen gemäß Fig. 1 in einem vormontierten Zustand auf einem Fittinggrundkörper,
  • Fig. 3 zwei Presshülsen gemäß Fig. 1 in einem fertig montierten Zustand auf einen Fittinggrundkörper mit zwei Rohrenden,
  • Fig. 4 eine zweite Presshülse in einer perspektivischen Ansicht,
  • Fig. 5 zwei Presshülsen gemäß Fig. 4 in einem vormontierten Zustand auf einem Fittinggrundkörper,
  • Fig. 6 zwei Presshülsen gemäß Fig. 4 in einem fertig montierten Zustand auf einem Fittinggrundkörper mit zwei Rohrenden,
  • Fig. 7 eine dritte Presshülse in einer perspektivischen Ansicht,
  • Fig. 8 zwei Presshülsen gemäß Fig. 7 in einem vormontierten Zustand auf einem Fittinggrundkörper,
  • Fig. 9 zwei Presshülsen gemäß Fig. 7 in einem fertig montierten Zustand auf einem Fittinggrundkörper mit zwei Rohrenden,
  • Fig. 10 eine vierte Presshülse in einer perspektivischen Ansicht,
  • Fig. 11 zwei Presshülsen gemäß Fig. 10 in einem vormontierten Zustand auf einem Fittinggrundkörper,
  • Fig. 12 zwei Presshülsen gemäß Fig. 10 in einem fertig montierten Zustand auf einem Fittinggrundkörper mit zwei Rohrenden,
  • Fig. 13 eine fünfte Presshülse in einer perspektivischen Ansicht,
  • Fig. 14 zwei Presshülsen gemäß Fig. 13 in einem vormontierten Zustand auf einem Fittinggrundkörper,
  • Fig. 15 zwei Presshülsen gemäß Fig. 13 in einem fertig montierten Zustand auf einem Fittinggrundkörper mit zwei Rohrenden,
  • Fig. 16 eine sechste Presshülse in einer perspektivischen Ansicht,
  • Fig. 17 zwei Presshülsen gemäß Fig. 16 in einem vormontierten Zustand auf einem Fittinggrundkörper,
  • Fig. 18 zwei Presshülsen gemäß Fig. 16 in einem fertig montierten Zustand auf einem Fittinggrundkörper mit zwei Rohrenden.
The invention will be explained in more detail by means of exemplary embodiments. In the drawing show:
  • Fig. 1 a first compression sleeve in a perspective view,
  • Fig. 2 two ferrules according to Fig. 1 in a preassembled condition on a fitting body,
  • Fig. 3 two ferrules according to Fig. 1 in a fully assembled state on a fitting body with two pipe ends,
  • Fig. 4 a second compression sleeve in a perspective view,
  • Fig. 5 two ferrules according to Fig. 4 in a preassembled condition on a fitting body,
  • Fig. 6 two ferrules according to Fig. 4 in a fully assembled state on a fitting body with two pipe ends,
  • Fig. 7 a third compression sleeve in a perspective view,
  • Fig. 8 two ferrules according to Fig. 7 in a preassembled condition on a fitting body,
  • Fig. 9 two ferrules according to Fig. 7 in a fully assembled state on a fitting body with two pipe ends,
  • Fig. 10 a fourth compression sleeve in a perspective view,
  • Fig. 11 two ferrules according to Fig. 10 in a preassembled condition on a fitting body,
  • Fig. 12 two ferrules according to Fig. 10 in a fully assembled state on a fitting body with two pipe ends,
  • Fig. 13 a fifth compression sleeve in a perspective view,
  • Fig. 14 two ferrules according to Fig. 13 in a preassembled condition on a fitting body,
  • Fig. 15 two ferrules according to Fig. 13 in a fully assembled state on a fitting body with two pipe ends,
  • Fig. 16 a sixth compression sleeve in a perspective view,
  • Fig. 17 two ferrules according to Fig. 16 in a preassembled condition on a fitting body,
  • Fig. 18 two ferrules according to Fig. 16 in a fully assembled state on a fitting body with two pipe ends.

Fig. 1 zeigt eine erste Presshülse 2 in einer perspektivischen Ansicht. Die Presshülse 2 für einen Pressfitting zum Herstellen einer dichtenden unlösbaren Rohrverbindung hat einen Aufnahmeabschnitt 4 zum Aufnehmen eines radial zu verpressenden Fittinggrundkörpers 6 (siehe Fig. 2). Die Presshülse 2 hat einen zum radialen Verengen des Fittinggrundkörpers 6 ausgebildeten Pressabschnitt 8, der entlang einer Achse A betrachtet verjüngt ausgeführt ist. Der Innendurchmesser des Aufnahmeabschnitts 4 ist an den Außendurchmesser des Fittinggrundkörpers 6 angepasst. Der Innendurchmesser des Pressabschnitts 8 ist zumindest abschnittsweise kleiner als der Außendurchmesser des Fittinggrundkörpers 6. Fig. 1 shows a first compression sleeve 2 in a perspective view. The press sleeve 2 for a press fitting for producing a sealing permanent pipe connection has a receiving portion 4 for receiving a radially to be compressed Fittinggrundkörpers 6 (see Fig. 2 ). The compression sleeve 2 has a press section 8 designed to radially narrow the fitting body 6, which is designed to be tapered along an axis A. The inner diameter of the receiving portion 4 is adapted to the outer diameter of the Fittinggrundkörpers 6. The inner diameter of the pressing portion 8 is at least partially smaller than the outer diameter of the fitting body 6.

Die Presshülse 2 hat drei in radialer Richtung federnd elastisch gegen den Fittinggrundkörper 6 verspannbare Haltelaschen 10. Die Haltelaschen 10 weisen jeweils einen freien Endabschnitt 12 auf. Im entspannten Zustand (Fig. 1) der Haltelaschen 10 ragt der jeweilige Endabschnitt 12 in radialer Richtung R mindestens teilweise in den Innenbereich des Aufnahmeabschnitts 4 hinein.The compression sleeve 2 has three in the radial direction resiliently elastically against the fitting body 6 bracing retaining tabs 10. The retaining tabs 10 each have a free end portion 12. In the relaxed state ( Fig. 1 ) of the retaining tabs 10, the respective end section 12 projects at least partially into the inner region of the receiving section 4 in the radial direction R.

Die Presshülse 2 ist durch Tiefziehen aus einem Blech hergestellt. Die Haltelaschen 10 sind durch zwischen einer inneren Mantelfläche 14 und einer äußeren Mantelfläche 16 der Presshülse 2 vorgesehene radiale Öffnungen 18 freigestellt. Die Öffnungen 18 sind durch Stanzen hergestellt. Die Haltelaschen 10 sind nach dem Stanzen in radialer Richtung R nach innen gebogen worden, so dass der jeweilige freie Endabschnitt 12 einer Haltelasche 10 im entspannten Zustand (Fig. 1) mindestens teilweise in den Innenbereich des Aufnahmeabschnitts 4 hineinragt.The compression sleeve 2 is made by deep drawing from a metal sheet. The retaining tabs 10 are exposed by provided between an inner circumferential surface 14 and an outer circumferential surface 16 of the compression sleeve 2 radial openings 18. The openings 18 are made by punching. The retaining tabs 10 have been bent inwardly in the radial direction R after punching, so that the respective free end portion 12 of a retaining tab 10 in the relaxed state ( Fig. 1 ) projects at least partially into the inner region of the receiving portion 4.

Die Presshülse 2 weist eine zum Einführen des Fittinggrundkörpers 6 vorgesehene Stirnseite 20 auf. Die Haltelaschen 10 sind in von der Stirnseite 20 abgewandter Richtung geneigt. Eine der Stirnseite 20 zugewandte Führungsfläche 22 der jeweiligen Haltelasche 10 ist zu der Achse A unter einem spitzen Winkel α geneigt (siehe Fig. 2). Die Haltelasche 10 weist im Bereich ihres freien Endabschnitts 12 eine rechtwinklige, also scharfkantige Presskante 24 auf, die zur Anlage an dem Fittinggrundkörper 6 vorgesehen ist.The compression sleeve 2 has a front side 20 provided for insertion of the fitting body 6. The retaining tabs 10 are inclined in the direction away from the end 20 direction. One of the end face 20 facing guide surface 22 of the respective retaining tab 10 is inclined to the axis A at an acute angle α (see Fig. 2 ). The retaining tab 10 has in the region of its free end portion 12 a rectangular, ie sharp-edged pressing edge 24 which is provided for engagement with the fitting base 6.

Der Aufnahmeabschnitt 4 der Presshülse 2 ist der zum Einführen des Fittinggrundkörpers 6 vorgesehenen Stirnseite 20 zugeordnet. Der Aufnahmeabschnitt 4 weist entlang seiner in axialer Richtung gemessenen Länge eine im Wesentlichen konstante Öffnungsweite auf. An den Aufnahmeabschnitt 4 ist der sich in von der Stirnseite 20 abgewandter Richtung erstreckende Pressabschnitt 8 angeschlossen. Der Pressabschnitt 8 ist in von der Stirnseite 20 abgewandter Richtung verjüngt ausgeführt. An den Pressabschnitt 8 ist ein in von der Stirnseite 20 abgewandter Richtung erstreckter Endabschnitt 26 angeschlossen, in dem die Presshülse 2 eine im Wesentlichen konstante Öffnungsweite hat. Die Haltelaschen 10 sind in dem Aufnahmeabschnitt 4 vorgesehen. Die Haltelaschen 10 sind in regelmäßigen Winkelabständen zueinander angeordnet.The receiving section 4 of the compression sleeve 2 is assigned to the end face 20 provided for insertion of the fitting base body 6. The receiving section 4 has a substantially constant opening width along its length measured in the axial direction. To the receiving portion 4 of extending in the direction away from the end face 20 direction pressing section 8 is connected. The pressing section 8 is tapered in the direction away from the end face 20. To the pressing portion 8 a in the direction away from the end face 20 remote end portion 26 is connected, in which the compression sleeve 2 has a substantially constant opening width. The retaining tabs 10 are provided in the receiving portion 4. The retaining tabs 10 are arranged at regular angular intervals from one another.

Fig. 2 zeigt zwei Presshülsen 2 gemäß Fig. 1 und den Fittinggrundkörper 6, der mit Hilfe der Presshülsen 2 zu verpressen ist, in einem vormontierten Zustand. Die Presshülsen 2 und der Fittinggrundkörper 6 bilden einen Pressfitting 28 zum Verbinden zweier Rohrenden 30 (siehe Fig. 3). Die Rohrenden 30 sind jeweils in den Fittinggrundkörper 6 einführbar. Durch ein Umbördeln des Rands 32 des Fittinggrundkörpers 6 werden die Rohrenden 30 mit dem Fittinggrundkörper 6 verpresst. Dazu werden die Presshülsen 2 ausgehend von der in Fig. 2 dargestellten Vormontageposition in axialer Richtung entlang der Achse A auf den Fittinggrundkörper 6 aufgeschoben. Fig. 2 shows two press sleeves 2 according to Fig. 1 and the fitting body 6 to be pressed by the press sleeves 2 in a pre-assembled state. The press sleeves 2 and the Fittinggrundkörper 6 form a press fitting 28 for connecting two pipe ends 30 (see Fig. 3 ). The pipe ends 30 are each inserted into the fitting body 6. By crimping the edge 32 of the fitting body 6, the pipe ends 30 are pressed with the fitting body 6. For this purpose, the compression sleeves 2, starting from the in Fig. 2 shown pre-assembly in the axial direction along the axis A pushed onto the fitting body 6.

Fig. 3 zeigt den Pressfitting 28 mit den Rohrenden 30 im fertig montierten, verpressten Zustand. Die Rohrenden 30 sind jeweils bis zu einem im Bereich der inneren Mantelfläche des Fittinggrundkörpers 6 vorgesehenen Anschlag 34 in den Fittinggrundkörper 6 eingeschoben. Aus der vergrößerten Darstellung ist erkennbar, wie Presshülse 2, Fittinggrundkörper 6 und Rohrende 30 jeweils zusammenwirken. Fig. 3 shows the press fitting 28 with the pipe ends 30 in the fully assembled, compressed state. The pipe ends 30 are each inserted into the fitting base body 6 up to a stop 34 provided in the region of the inner circumferential surface of the fitting body 6. From the enlarged view can be seen how compression sleeve 2, Fittinggrundkörper 6 and pipe end 30 each cooperate.

Beim Verpressen des Pressfittings 28 mit einem jeweiligen Rohrende 30 wird die Presshülse 2 in axialer Richtung auf den Fittinggrundkörper 6 aufgeschoben. Dazu wird ein hier nicht dargestelltes, beispielsweise aus WO 2014/000897 A1 bekanntes Presswerkzeug verwendet. Der Randbereich bzw. der Rand 32 des Fittinggrundkörpers 4 gleitet während des axialen Verschiebens entlang des sich im Durchmesser verengenden Pressabschnitts 8 der Presshülse 2 ab. Dabei wird der Randbereich bzw. der Rand 32 des Fittinggrundkörpers 6 in radial nach innen gewandter Richtung umgebördelt. Mit anderen Worten bildet die Presshülse 2 eine Matrize, wobei sich der Randbereich bzw. der Rand 32 des Fittinggrundkörpers 6 während des Pressvorgangs an den konisch zulaufenden Pressabschnitt 8 der Presshülse 2 anschmiegt, so dass der Randbereich bzw. der Rand 32 des Fittinggrundkörpers 6 entlang der Innenkontur des Pressabschnitts 8 abgleitet und dadurch plastisch verformt wird. Die Form der Presshülse 2 bleibt im Wesentlichen unverändert.When pressing the press fitting 28 with a respective pipe end 30, the compression sleeve 2 is pushed in the axial direction on the fitting base 6. This is not shown here, for example WO 2014/000897 A1 known pressing tool used. The edge region or the edge 32 of the fitting body 4 slides during the axial displacement along the diameter narrowing pressing portion 8 of the compression sleeve 2 from. In this case, the edge region or the edge 32 of the fitting body 6 is flanged in radially inwardly facing direction. In other words, the compression sleeve 2 forms a die, wherein the edge region or the edge 32 of the Fittinggrundkörpers 6 during the pressing process to the tapered pressing section 8 of the compression sleeve 2 conforms, so that the edge region or the edge 32 of the Fittinggrundkörpers 6 along the Slid inner contour of the pressing section 8 and thereby plastically deformed. The shape of the compression sleeve 2 remains substantially unchanged.

Die Haltelaschen 10 greifen mit ihren Presskanten 24 in das Material des Fittinggrundkörpers 6 ein und verhindern ein axiales Abrutschen der jeweiligen Presshülse 2 von dem Fittinggrundkörper 6. Das Material der Presshülse 2 ist härter als das Material des Fittinggrundkörpers 6. Die jeweilige Presshülse 2 ist nach dem axialen Aufschieben auf den Fittinggrundkörper 6 nicht mehr zerstörungsfrei von dem Fittinggrundkörper 6 abziehbar, da sich die Haltelaschen 10 mit den freien Endabschnitten 12 in dem Fittinggrundkörper 6 festkrallen.The retaining tabs 10 engage with their press edges 24 in the material of the fitting body 6 and prevent axial slipping of the respective compression sleeve 2 of the Fittinggrundkörper 6. The material of the compression sleeve 2 is harder than the material of the Fittinggrundkörpers 6. The respective compression sleeve 2 is after axial sliding on the fitting body 6 no longer destructively removable from the fitting body 6, since the retaining tabs 10 with the free end portions 12 cling in the fitting body 6.

Nachstehend werden weitere Ausführungsbeispiele von Presshülsen beschrieben, wobei im Vergleich zum zuvor beschriebenen Ausführungsbeispiel im Wesentlichen gleichwirkenden Komponenten bzw. strukturellen Merkmalen gleiche Bezugszeichen zugordnet werden.Hereinafter, further embodiments of compression sleeves will be described, wherein in comparison to the previously described embodiment, the same reference numerals or structural features are assigned like reference numerals.

Fig. 4 zeigt ein zweites Ausführungsbeispiel einer Presshülse 2 in einer perspektivischen Ansicht. Die in Fig. 3 dargestellte Presshülse 2 unterscheidet sich lediglich dadurch von dem in Fig. 1 beschriebenen Ausführungsbeispiel, dass auf den Endabschnitt verzichtet worden ist. Fig. 4 shows a second embodiment of a compression sleeve 2 in a perspective view. In the Fig. 3 illustrated compression sleeve 2 is different only by the in Fig. 1 described embodiment that has been dispensed with the end portion.

Fig. 5 zeigt zwei Presshülsen 2 gemäß Fig. 4 und einen Fittinggrundkörper 6 in einem vormontierten Zustand. Wie auch bei dem ersten Ausführungsbeispiel sichern die Haltelaschen 10 die Presshülsen 2 bereits im vormontierten Zustand von einem axialen Abziehen oder Abrutschen der Presshülsen 2 von dem Fittinggrundkörper 6 entgegen der Montage- bzw. Fügerichtung. Fig. 5 shows two press sleeves 2 according to Fig. 4 and a fitting body 6 in a preassembled state. As in the first embodiment, the retaining tabs 10 secure the press sleeves 2 already in the preassembled state by an axial withdrawal or slipping of the press sleeves 2 of the fitting body 6 against the mounting or joining direction.

Fig. 6 zeigt zwei Presshülsen 2 gemäß Fig. 4 in einem fertig montierten Zustand auf dem Fittinggrundkörper 6 mit zwei Rohrenden 30. Aus der Einzelheit ist wiederum das Zusammenwirken von Presshülse 2, Fittinggrundkörper 6 und Rohrende 30 zu entnehmen. Fig. 6 shows two press sleeves 2 according to Fig. 4 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail in turn the interaction of compression sleeve 2, Fittinggrundkörper 6 and pipe end 30 can be seen.

Fig. 7 zeigt ein drittes Ausführungsbeispiel einer Presshülse 2 in einer perspektivischen Ansicht, die sich dadurch von dem in Fig. 1 beschriebenen Ausführungsbeispiel unterscheidet, dass auf einen Endabschnitt verzichtet worden ist und dass der Aufnahmeabschnitt 4 stirnseitig in einen kreisrund umlaufenden Flansch 36 übergeht. Die Haltelaschen 10 sind im Bereich des Flanschs 36 angeordnet. Die Haltelaschen 10 sind gegenüber den zuvor beschriebenen Ausführungsbeispielen unter einem wesentlich steileren Winkel α gegenüber der Achse A angestellt. Auf diese Weise kann wird eine in axialer Richtung besonders schmale Bauform der Presshülse erreicht. Fig. 7 shows a third embodiment of a compression sleeve 2 in a perspective view, which is characterized by the in Fig. 1 described embodiment that has been dispensed with an end portion and that the receiving portion 4 merges the front side in a circular peripheral flange 36. The retaining tabs 10 are arranged in the region of the flange 36. The retaining tabs 10 are compared to the embodiments described above at a much steeper angle α against the axis A employed. In this way, a particularly narrow axial design of the compression sleeve is achieved.

Fig. 8 zeigt zwei Presshülsen 2 gemäß Fig. 7 und einen Fittinggrundkörper 6 in einem vormontierten Zustand. Wie auch bei den zuvor beschriebenen Ausführungsbeispielen sichern die Haltelaschen 10 die Presshülsen 2 bereits im vormontierten Zustand von einem axialen Abziehen oder Abrutschen der Presshülsen 2 von dem Fittinggrundkörper 6 entgegen der Montage- bzw. Fügerichtung. Fig. 8 shows two press sleeves 2 according to Fig. 7 and a fitting body 6 in a preassembled state. As in the embodiments described above, the retaining tabs 10 secure the press sleeves 2 already in the preassembled state by an axial withdrawal or slipping of the press sleeves 2 of the fitting body 6 against the mounting or joining direction.

Fig. 9 zeigt zwei Presshülsen 2 gemäß Fig. 7 in einem fertig montierten Zustand auf dem Fittinggrundkörper 6 mit zwei Rohrenden 30. Aus der Einzelheit ist das Zusammenwirken von Presshülse 2, Fittinggrundkörper 6 und Rohrende 30 zu entnehmen. Fig. 9 shows two press sleeves 2 according to Fig. 7 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail, the interaction of compression sleeve 2, Fittinggrundkörper 6 and pipe end 30 can be seen.

Fig. 10 zeigt ein viertes Ausführungsbeispiel einer Presshülse 2 in einer perspektivischen Ansicht. Die in Fig. 10 gezeigte Presshülse 2 zeichnet sich dadurch aus, dass die Haltelaschen 10 unmittelbar stirnseitig an dem Aufnahmeabschnitt 4 vorgesehen sind. Sowohl der Rand des Aufnahmeabschnitts als auch der Rand des Pressabschnitts sind kreis- bzw. bogenförmig umgebördelt. Auf diese Weise ist die Presshülse 2 entgegen einem radialen Aufweiten während des Pressvorgangs verstärkt bzw. ausgesteift. Fig. 10 shows a fourth embodiment of a compression sleeve 2 in a perspective view. In the Fig. 10 shown compression sleeve 2 is characterized in that the retaining tabs 10 are provided directly on the front side of the receiving portion 4. Both the edge of the receiving portion and the edge of the pressing portion are flanged circular or arcuate. In this way, the compression sleeve 2 is reinforced or stiffened against radial expansion during the pressing process.

Fig. 11 zeigt zwei Presshülsen 2 gemäß Fig. 10 und einen Fittinggrundkörper 6 in einem vormontierten Zustand. Wie auch bei den zuvor beschriebenen Ausführungsbeispielen sichern die Haltelaschen 10 die Presshülsen 2 bereits im vormontierten Zustand von einem axialen Abziehen oder Abrutschen der Presshülsen 2 von dem Fittinggrundkörper 6 entgegen der Montage- bzw. Fügerichtung. Fig. 11 shows two press sleeves 2 according to Fig. 10 and a fitting body 6 in a preassembled state. As in the embodiments described above, the retaining tabs 10 secure the press sleeves 2 already in the preassembled state by an axial withdrawal or slipping of the press sleeves 2 of the fitting body 6 against the mounting or joining direction.

Fig. 12 zeigt zwei Presshülsen 2 gemäß Fig. 10 in einem fertig montierten Zustand auf dem Fittinggrundkörper 6 mit zwei Rohrenden 30. Aus der Einzelheit ist das Zusammenwirken von Presshülse 2, Fittinggrundkörper 6 und Rohrende 30 zu entnehmen. Fig. 12 shows two press sleeves 2 according to Fig. 10 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail, the interaction of compression sleeve 2, Fittinggrundkörper 6 and pipe end 30 can be seen.

Fig. 13 zeigt ein fünftes Ausführungsbeispiel einer Presshülse 2 in einer perspektivischen Ansicht. Hierbei ist die Haltelasche 10 unmittelbar stirnseitig an dem Aufnahmeabschnitt 4 vorgesehen, wobei sich die Haltelasche 10 über den gesamten Umfang der Presshülse 2 erstreckt. Hierfür ist der Rand des Aufnahmeabschnitts 4 bogenförmig um mehr als 90° nach innen umgebördelt. Die Presshülse 2 ist weiter entgegen dem in den Fig. 10 bis 12 gezeigten Ausführungsbeispiel aus einem Bauteil mit verschiedenen Wanddicken ausgestaltet, um insbesondere den Pressbereich 8 zu verstärken. Fig. 13 shows a fifth embodiment of a compression sleeve 2 in a perspective view. Here, the retaining tab 10 is provided directly on the front side of the receiving portion 4, wherein the retaining tab 10 extends over the entire circumference of the compression sleeve 2. For this purpose, the edge of the receiving portion 4 is curved in an arcuate shape by more than 90 ° inwardly. The compression sleeve 2 is further opposite to in the 10 to 12 shown Embodiment designed from a component with different wall thicknesses, in particular to reinforce the pressing region 8.

Fig. 14 zeigt zwei Presshülsen 2 gemäß Fig. 13 und einen Fittinggrundkörper 6 in einem vormontierten Zustand. Die Haltelasche 10 sichert die Presshülsen 2 im vormontierten Zustand von einem axialen Abziehen oder Abrutschen der Presshülsen 2 von dem Fittinggrundkörper 6 entgegen der Montage- bzw. Fügerichtung. Fig. 14 shows two press sleeves 2 according to Fig. 13 and a fitting body 6 in a preassembled state. The retaining tab 10 secures the press sleeves 2 in the preassembled state by an axial withdrawal or slipping of the press sleeves 2 of the fitting body 6 against the mounting or joining direction.

Fig. 15 zeigt zwei Presshülsen 2 gemäß Fig. 13 in einem fertig montierten Zustand auf dem Fittinggrundkörper 6 mit zwei Rohrenden 30. Aus der Einzelheit ist das Zusammenwirken von Presshülse 2, Fittinggrundkörper 6 und Rohrende 30 zu entnehmen. Fig. 15 shows two press sleeves 2 according to Fig. 13 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail, the interaction of compression sleeve 2, Fittinggrundkörper 6 and pipe end 30 can be seen.

Fig. 16 zeigt ein sechstes Ausführungsbeispiel einer Presshülse 2 in einer perspektivischen Ansicht. Die Haltelaschen 10 sind hierbei als Elemente eines vom Grundkörper der Presshülse 2 separaten Schneidringes 38 ausgeführt. Eine Vielzahl von Haltelaschen 10 wird über den Schneidring 38 entlang des Umfangs der Presshülse bereitgestellt. Der Schneidring 38 und die Haltelaschen 10 können aus einem von der restlichen Presshülse verschiedenen Material gefertigt sein. Fig. 16 shows a sixth embodiment of a compression sleeve 2 in a perspective view. The retaining tabs 10 are in this case designed as elements of a separate from the main body of the compression sleeve 2 cutting ring 38. A plurality of retaining tabs 10 are provided over the cutting ring 38 along the circumference of the compression sleeve. The cutting ring 38 and the retaining tabs 10 may be made of a different material from the rest of the compression sleeve.

Fig. 17 zeigt zwei Presshülsen 2 gemäß Fig. 16 und einen Fittinggrundkörper 6 in einem vormontierten Zustand. Der Schneidring 38 mit den daran angeordneten Haltelaschen wird in einer Nut 40 im Aufnahmeabschnitt 4 gehalten. Die Haltelasche 10 sichert die Presshülsen 2 im vormontierten Zustand auf dem Fittinggrundkörper 6. Fig. 17 shows two press sleeves 2 according to Fig. 16 and a fitting body 6 in a preassembled state. The cutting ring 38 with the holding tabs arranged thereon is held in a groove 40 in the receiving portion 4. The retaining tab 10 secures the press sleeves 2 in the preassembled state on the fitting body 6.

Fig. 18 zeigt zwei Presshülsen 2 gemäß Fig. 16 in einem fertig montierten Zustand auf dem Fittinggrundkörper 6 mit zwei Rohrenden 30. Aus der Einzelheit ist das Zusammenwirken von Presshülse 2, Fittinggrundkörper 6 und Rohrende 30 zu entnehmen. Fig. 18 shows two press sleeves 2 according to Fig. 16 in a finished assembled state on the fitting body 6 with two pipe ends 30. From the detail, the interaction of compression sleeve 2, Fittinggrundkörper 6 and pipe end 30 can be seen.

Claims (15)

  1. Pressing sleeve for a press fitting for producing a sealing, non-releasable pipe connection,
    - having a receiving section (4) for receiving a main fitting body (6) and having a pressing section (8),
    - wherein the inner diameter of the receiving section (4) is adapted to the outer diameter of the main fitting body (6), and
    - wherein the inner diameter of the pressing section (8) is at least in sections designed to be smaller than the outer diameter of the main fitting body (6),
    characterised in that
    - at least one retaining lug (10) which can be clamped resiliently elastically inwards in the radial direction (R) is provided in the receiving section (4), and in that
    - the retaining lug (10) has a free end section (12) which, with the retaining lug (10) in the undamped state, protrudes in the radial direction (R) at least partially into the interior of the receiving section (4).
  2. Pressing sleeve according to Claim 1,
    characterised in that the pressing sleeve (2) is produced by forming, in particular by deep drawing.
  3. Pressing sleeve according to either one of Claims 1 and 2,
    characterised in that the retaining lug (10) is released through a radial opening provided between an inner lateral surface (14) and an outer lateral surface (16) of the pressing sleeve.
  4. Pressing sleeve according to any one of Claims 1 to 3,
    characterised in that the pressing sleeve (2) in the area of the receiving section (4) has a face side (20) provided for inserting the main fitting body (6), and in that the retaining lug (10) is inclined in the direction facing away from the face side (20).
  5. Pressing sleeve according to Claim 4,
    characterised in that a guide surface (22) of the retaining lug (10) facing the face side (20) is arranged inclined at an angle (α) in relation to a central axis (A) of the pressing sleeve (2), wherein the angle (α) is greater than 0° and less than 90°.
  6. Pressing sleeve according to any one of Claims 1 to 5,
    characterised in that a pressing edge (24) provided for abutting on the main fitting body (6) is formed in the area of the free end section (12) of the at least one retaining lug (10), wherein the pressing edge (24) is in particular sharp-edged.
  7. Pressing sleeve according to any one of Claims 1 to 6,
    characterised in that the receiving section (4) has an essentially constant opening width along its length measured in the axial direction.
  8. Pressing sleeve according to Claim 4,
    characterised in that the pressing section (8) extended in the direction facing away from the face side (20) is attached to the receiving section (4), wherein the inner diameter of the pressing section is tapered in the direction facing away from the face side (20).
  9. Pressing sleeve according to Claim 8,
    characterised in that an end section (26) extended in the direction facing away from the face side (20) is attached to the pressing section (8), wherein the pressing sleeve (2) has in particular an essentially constant opening width in the area of the end section (26).
  10. Pressing sleeve according to any one of Claims 1 to 9,
    characterised in that the receiving section (4) on the face side merges into a circularly circumferential flange (36).
  11. Pressing sleeve according to any one of Claims 1 to 10,
    characterised in that two or more, in particular three or more, retaining lugs (10) are provided.
  12. Pressing sleeve according to Claim 11,
    characterised in that the retaining lugs (10) are in particular arranged at regular angular distances in relation to one another.
  13. Pressing sleeve according to Claim 11,
    characterised in that the retaining lugs (10) are formed as separate elements, in particular in the form of a cutting ring (38).
  14. Press fitting for a sealing, non-releasable pipe connection,
    - having a main fitting body (6) for accommodating at least one pipe (30) to be connected and
    - having a pressing sleeve (2) according to any one of the preceding claims.
  15. Use of a pressing sleeve or of a press fitting according to any one of the preceding claims in a heating installation, air-conditioning installation, sanitary installation or drinking water installation or in an installation for conveying technical or medical fluids.
EP16704844.6A 2015-03-05 2016-02-17 Press sleeve, press fitting and use of the press fitting or the press sleeve Active EP3265711B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16704844T PL3265711T3 (en) 2015-03-05 2016-02-17 Press sleeve, press fitting and use of the press fitting or the press sleeve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015103228.7A DE102015103228B4 (en) 2015-03-05 2015-03-05 Press sleeve, press fitting and use of press fitting or compression sleeve
PCT/EP2016/053362 WO2016139062A1 (en) 2015-03-05 2016-02-17 Press sleeve, press fitting and use of the press fitting or the press sleeve

Publications (2)

Publication Number Publication Date
EP3265711A1 EP3265711A1 (en) 2018-01-10
EP3265711B1 true EP3265711B1 (en) 2019-04-03

Family

ID=55361502

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Application Number Title Priority Date Filing Date
EP16704844.6A Active EP3265711B1 (en) 2015-03-05 2016-02-17 Press sleeve, press fitting and use of the press fitting or the press sleeve

Country Status (14)

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US (1) US20180051834A1 (en)
EP (1) EP3265711B1 (en)
JP (1) JP6475857B2 (en)
KR (1) KR101931734B1 (en)
CN (1) CN107407446B (en)
AU (1) AU2016227853B2 (en)
BR (1) BR112017017534B1 (en)
CA (1) CA2978367C (en)
DE (1) DE102015103228B4 (en)
DK (1) DK3265711T3 (en)
ES (1) ES2722525T3 (en)
PL (1) PL3265711T3 (en)
RU (1) RU2660231C1 (en)
WO (1) WO2016139062A1 (en)

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DE102017108206B4 (en) 2017-04-18 2020-06-18 Faurecia Autositze Gmbh Adjustment arrangement for an adjustment device of a vehicle seat, method for producing such an adjustment arrangement and vehicle seat
CN108326551B (en) * 2017-12-29 2023-06-20 江苏集萃智能制造技术研究所有限公司 Go up nut and flaring mechanism
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Also Published As

Publication number Publication date
JP6475857B2 (en) 2019-02-27
RU2660231C1 (en) 2018-07-05
EP3265711A1 (en) 2018-01-10
KR20170132773A (en) 2017-12-04
ES2722525T3 (en) 2019-08-13
WO2016139062A1 (en) 2016-09-09
DE102015103228B4 (en) 2018-03-22
DK3265711T3 (en) 2019-04-23
AU2016227853B2 (en) 2018-08-30
KR101931734B1 (en) 2018-12-24
AU2016227853A1 (en) 2017-09-28
CN107407446A (en) 2017-11-28
DE102015103228A1 (en) 2016-09-08
CA2978367A1 (en) 2016-09-09
US20180051834A1 (en) 2018-02-22
CA2978367C (en) 2018-10-02
CN107407446B (en) 2019-10-08
PL3265711T3 (en) 2019-07-31
BR112017017534B1 (en) 2021-02-23
BR112017017534A2 (en) 2018-12-11
JP2018511012A (en) 2018-04-19

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